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There is an error in your code. That is why you aren’t getting an output. The integer ‘i’ is not incremented, instead it is decremented and the length is also decremented. import java.util.*; class ReverseString { public static void main(String args[]) { String original, reverse = “”; Scanner in = new Scanner(System.in); System.out.println(“Enter a string to reverse”); original = in.nextLine(); int length = original.length(); for (int i = length – 1 ; i >= 0 ; i–) reverse = reverse + original.charAt(i); System.out.println(“Reverse of the string: ” + reverse); } }

You can reverse the string using stringbuilder as well public class Main { public static void main(String args[]) { String number = “1234”; System.out.println(“original String: ” + number); String reversed = inPlaceReverse(number); System.out.println(“reversed String: ” + reversed); }